The twelve-year-old Dino is spending such a boring summer on the Island that he can't wait for the new school year to start so he can see his friends again. When he and his group, on one of their outings, find some rare stones, they feel very lucky for this discovery. However, as they realize that these stones carry powers that are connected exclusively to each of them and that they must carry them with them, they soon realize that they have been entrusted with a huge responsibility. In one night, their carefree life changes radically.

Then, he and his friends face the challenges of their new life. Guided by their instinct, they experience dangerous situations, undergo daring trials, and have to face new enemies while trying to stay united. How far are they willing to go? Because the Sekrou are not a simple matter.